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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.dreams.phototable;
import android.content.Context;
import android.content.res.Resources;
import android.view.MotionEvent;
/**
* Detect and dispatch edge events.
*/
public class EdgeSwipeDetector {
@SuppressWarnings("unused")
private static final String TAG = "EdgeSwipeDetector";
private float mEdgeSwipeGutter;
private float mEdgeSwipeThreshold;
private boolean mEdgeSwipe;
private final PhotoTable mTable;
public EdgeSwipeDetector(Context context, PhotoTable table) {
mTable = table;
final Resources resources = context.getResources();
mEdgeSwipeGutter = resources.getInteger(R.integer.table_edge_swipe_gutter) / 1000000f;
mEdgeSwipeThreshold = resources.getInteger(R.integer.table_edge_swipe_threshold) / 1000000f;
}
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
float edgeGutter = event.getDevice().getMotionRange(MotionEvent.AXIS_X).getMax()
* mEdgeSwipeGutter;
if (event.getX() < edgeGutter) {
mEdgeSwipe = true;
return true;
}
break;
case MotionEvent.ACTION_MOVE:
if (mEdgeSwipe) {
return true;
}
break;
case MotionEvent.ACTION_UP:
if (mEdgeSwipe) {
mEdgeSwipe = false;
float enough = event.getDevice().getMotionRange(MotionEvent.AXIS_X).getMax()
* mEdgeSwipeThreshold;
if (event.getX() > enough) {
if (mTable.hasFocus()) {
mTable.fling(mTable.getFocus());
} else if (mTable.hasSelection()) {
mTable.clearSelection();
}
}
return true;
}
break;
}
return false;
}
}
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